I love mine. I have had it for about six years now.

I love mine. I have had it for about six years now. I gave it 4 stars because I believe the WaterWorks EX microfilter is a better filter now. If you are looking for a water filter I would go with the WaterWorks EX microfilter. It is a bit more expensive and heavier but worth it. If money is a problem go with the MSR MiniWorks. Always check EBAY.

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Excellent water filter, easy to clean and is compatible…

Excellent water filter, easy to clean and is compatible with all Nalgene and MSR water bottle threads. Its strong point is its construction, which has not been compromised to get a lighter weight. Very sturdy pump lever and overall build, one of the few pump-type filters I've used that didn't break after the first trip (the Marine Corps adopted the MiniWorks for its recon units). Try it, you'll love it.

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OK, this filter may work well in CLEAN water but it…

OK, this filter may work well in CLEAN water but it will fail miserably in conditions like the BWCA. It lasts about 1 day then the cartridge is totally unusable and uncleanable. Stay away from this one. It is junk!